问题描述:
HAVE YOU EVER COME ACROSS THIS?
做以下过程:从2—9中任选一个数,在乘以9.再把所得的两位数的个位和十位相加得到得数为9.为何会这样?
PLEASE!请您仔细审题PLEASE!
做以下过程:从2—9中任选一个数,在乘以9.再把所得的两位数的个位和十位相加得到得数为9.为何会这样?
PLEASE!请您仔细审题PLEASE!
问题解答:
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